//package opencv.features2D.feature_detection;
//
//import org.opencv.core.Core;
//import org.opencv.core.Mat;
//import org.opencv.core.MatOfKeyPoint;
//import org.opencv.features2d.Features2d;
//import org.opencv.highgui.HighGui;
//import org.opencv.imgcodecs.Imgcodecs;
//import org.opencv.xfeatures2d.SURF;
//
//class SURFDetection {
//    public void run(String[] args) {
//        String filename = args.length > 0 ? args[0] : "../data/box.png";
//        Mat src = Imgcodecs.imread(filename, Imgcodecs.IMREAD_GRAYSCALE);
//        if (src.empty()) {
//            System.err.println("Cannot read image: " + filename);
//            System.exit(0);
//        }
//
//        //-- Step 1: Detect the keypoints using SURF Detector
//        double hessianThreshold = 400;
//        int nOctaves = 4, nOctaveLayers = 3;
//        boolean extended = false, upright = false;
//        SURF detector = SURF.create(hessianThreshold, nOctaves, nOctaveLayers, extended, upright);
//        MatOfKeyPoint keypoints = new MatOfKeyPoint();
//        detector.detect(src, keypoints);
//
//        //-- Draw keypoints
//        Features2d.drawKeypoints(src, keypoints, src);
//
//        //-- Show detected (drawn) keypoints
//        HighGui.imshow("SURF Keypoints", src);
//        HighGui.waitKey(0);
//
//        System.exit(0);
//    }
//}
//
//public class SURFDetectionDemo {
//    public static void main(String[] args) {
//        // Load the native OpenCV library
//        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
//
//        new SURFDetection().run(args);
//    }
//}
